lt is made of seamless steel, the working pressure is 30 Mpa. The nominal capacity is 15L, 20L, 25L, 30L, 35L, 40L, 45L, 50L, 54L, 55L and 60L. Outside diameter is 219mm. The filling medium is inert gases such as Air, Oxygen, Nitrogen,Helium and Neon etc. The temperature of working environment is-40℃~~60℃. The design, manufacturing, inspect and acceptance are all according to《The Safety Supervision on Gas Cylinders》and GB/T5099《The Seamless Steel Gas Cylinders》.